2956

2806

كارشناسي ارشد

﴿خوردگي و حفاظت از مواد﴾

اصفهان: دانشگاه صنعتي اصفهان، دانشكده مواد

1384

ده، 96، [I]ص.: مصور، جدول، شكل، نمودار

1396/01/16

كتابنامه

مواد

مهندسي مواد

ID2806

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

Abstract In the presentstudy corrosion behavior of Nickel base coatingson carbon steel as a substratewas analyzed The sampleswere coatedusinga High v elocity Oxy Fuel HYOF thermal spraytechnique In order to investigate spray variables effects on coating qualityas compared with corrosion behavior of NiCr alloy in NaG 3 5 solution 6 designexperiments are considered The NiCr powder alloy is containing Cr 20 The sprayvariables are fuel oxygen 1 07 and 1 25 in reduction condition and also the powder feedrate 18 27 and 36 gr min were selected The HYOF coated sampleswere corrosion tested using the potentiostatic polarizationtester Analyzing the graphallowed the selection of the optimum operating conditions toachievethe desired specificationsof the HVOF coatings for their best corrosion resistancein the chosen environment Also the samplesstructureswere characterizedby an opticalmicroscopy a ScanningElectron Microscopy SEM and X Ray Diffraction XRD Thepresentphasestypes and coating porosity in the samplesare shown in the graphs Theanalysis of the results indicates that the fuel oxygen and the powder feed rate have asignificant effect on the porosity and corrosion resistance of these coatings Corrosionbehaviorof the sample which coated by fuel oxygen 1 25 and X wder feed rate 18 gr minis the bestone Ct 1 i t J j tr 1 Vt 1 15

حسين ادريس، مهدي صالحي

احمد ساعتچي

بهنام لطفي، كيوان رئيسي